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    • 1. 发明公开
    • Fast inter system push to talk operation
    • Schneller Zwischensystemdruck in einemGesprächsbetrieb
    • EP2160050A1
    • 2010-03-03
    • EP08163488.3
    • 2008-09-02
    • Rohill Technologies B.V
    • Bouwers, Egbert
    • H04W4/10
    • H04W4/10H04W72/005H04W76/45H04W92/02
    • Method for establishing a press-to-talk (PTT) session between a first terminal (16) serviced by a first communication system (10) and a second terminal (17) serviced by a second communication system (11), in which the first communication system (10) and second communication system are interconnected by a transmission link (12). The method includes receiving a transmission demand message (TX-DEMAND) from the first terminal (16), sending a transmission granted message (TX-GRANTED) to the first terminal (16) and a transmission demand message (TX-DEMAND) to the second communication system (11) if a communication channel is locally available for the press-to-talk session, receiving transmission packets from the first terminal (16) and relaying the transmission packets to the second communication system (11), and if receiving a transmission granted message (TX-GRANTED) from the second communication system (11) in reply to the transmission demand message (TX-DEMAND), continuing relaying transmission packets to the second communication system (11).
    • 用于在由第一通信系统(10)服务的第一终端(16)和由第二通信系统(11)服务的第二终端(17)之间建立一键通(PTT)会话的方法,其中第一 通信系统(10)和第二通信系统通过传输链路(12)互连。 该方法包括从第一终端(16)接收传输请求消息(TX-DEMAND),向第一终端(16)发送传输许可消息(TX-GRANTED)和发送请求消息(TX-DEMAND)到 第二通信系统(11),如果通信信道本地可用于所述按键通话会话,则从所述第一终端(16)接收传输分组并将所述传输分组中继到所述第二通信系统(11),并且如果接收到 传输授权消息(TX-GRANTED)从第二通信系统(11)回复传输请求消息(TX-DEMAND),继续中继传输分组到第二通信系统(11)。